javascript
Posted in
8890
3:13 am, May 14, 2021
set active class based on url value
this will check the full url and then loop through all the a elements in #test-div
when it finds a matching url it will add the class active to that button
this is good for persisting active links on page reload using javascript when you can not access the server side code.
Preview
HTML
<div id='test-div'>
<a href='https://kruxor.com/view/code/tiYPZ/&something-else' class='btn btn-primary'>Button 1</a>
<a href='https://kruxor.com/view/code/tiYPZ/' class='btn btn-primary'>Button 2</a>
<a href='https://kruxor.com/view/code/tiYPZ/&something' class='btn btn-primary'>Button 3</a>
</div>
CSS
.active {
background:#F00;
}
Javascript
window.onload = function() {
var all_links = document.getElementById("test-div").getElementsByTagName("a"),
i=0, len=all_links.length,
full_path = location.href.split('#')[0]; //Ignore hashes?
// Loop through each link.
for(; i<len; i++) {
if(all_links[i].href.split("#")[0] == full_path) {
all_links[i].className += " active";
}
}
if("https://kruxor.com/" == full_path) {
// set a default current -- sets the 1st item in the list as active.
all_links[0].className += " active";
}
}
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